Manufacture of rubber hose.



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MANUPAGTURE 0F RUBBER HOSE I APPLIGATION FILED MAR. 28, 1912. 1,094,879.

UNITED sTaTEs PATENT oEErcE.

HENRY ZENAS. COBB, OF WINCHESTER, MASSACHUSETTS.

MANUFACTURE OF RUBBER HOSE.

To all I107mm 'it-mcy conce/:1:

Bc it known that I, llnivnr Znxas Conn, a citizen of the United States. residing at "inchester in the county ot Middlesex and State ofr Massachusetts, have invented. eertain new and uset'ul Improvements in the Manufacture ot Rubber Hose, ol. which the following is a specification.

This invention relates to the manufacture of rubber hose, and relates to the impregnation of the fabric or textile layer or layers by means of a plastic rubber composition introduced during the operation of braiding or weaving.

The present invention is a-.variation or improvement upon that disclosed in my Pat-- ent. No. 1,002,64a granted September 5, 1911. ln that patent a coating means is provided by which a dense ilastic rubber composition of the character technically known as friction dough is applied upon the rubber core,v or upon an inner web braided or woven upon such core, after which the core or hose soA coated is carried a distance sutlicient to partially dry the coating, and a web is then braided upon it directly beneath a wiping die which removes the excess of coat-ing material and banks it into a mass through which the yarns converging to torni the web out their way while approaching the braiding point. ln my said patent these yarns are termed colleetively the shed, by analogy to the shed formed in weaving. My present. invention differs from that disclosed in said patent in that the coating mz'iterial is applied above the braiding point instead of beneath it; and is-so applied that. the eonverging'yarns enter the bottom ot' the mass of material in the coating chamber and serve to close the bottom of such chamber. Thus instead of passing the core or hose through the coating chamber before the braided web is applied, it is' passed through such chamber immediately after the braiding on of the web, so that the newly formed web is carried through the plastic material, the latter beingthus caused to penetrate the mesh thereof. y

My invent-ion includes both .the new process thus described, and the apparatus for performing 4 this process. y

In the accompanying drawings,-Figure l illustrates a fragment of a braiding machine with 4the addition thereto of' .the coating means, the View being "a vertical mid- Speccation of Letters Patent.

Application filed March 28, 1912. Serial No. 686,869.

Patented Apr. 28, 1914.

l section; Fig. Q'is a section on a larger scale snowing the lower part of the coating chamber with its bottom die: Fig. 3 1s a similar section showing a modified construction.

whole the braiding machine, and B designates as a` whole the coating means. The braiding machine being well known, is not illustrated `in detail, and requires no description other than to state that c c are the bobbins and Z Z the yarns proeeedingftherefrom and converging atthe braiding point where they are braided around the core C to forni the web C of the inished hose C2. The coating means is shown'as comprising a coating chamber D, to whichvthe rubber composition or friction dough is fed under suitable pressure in any convenient way, this chamber being located directly above the braidingpoint, and having a lower die E and an upper die F. The lower die may be a -fairly close itwith the hose as shown in Fig.A 8; Abut preferably itis much larger than the hose, as shown in Figs. l and Q, so that it permits the coatin'g material to gravit-ate into Contact with the yarns (Z d, whereby the material impregnates these yarns before they unite to .form the braided web, and the yarns partially cut their way through' the coating material just betere they thus unite. The material requires toI be fed into the chamber D justfast enough to supply the required amount for coating. and not so fast as to cause the m5,'- terial to exude downwardly beneath the yarns (Z (Z. Such gravitating movement beneath the converging yarns is'prevented by the travel of the yarns, which are continually moving upwardly and cent-rally, and which form a traveling net-work carrying the dough with them and preventing it from working down beneath them, if only the feed be properly regulated. 'Y

The hose with its newly formed4 web ascends through' the chamber D, being surrounded by the plastic material which thus penetrates the mesh of the web. At the top o'f the chamber thehose draws through the die F, which is made a 'close t with it, so that it acts asta wiper die and removes all coating material exterior to the web, leaving only that which impregnates the yarns and which has penetrated the interstices of the web.

For feedingthe coating material to the coating chamber, I have shown the same Referring to Fig. 1, A designates as a a o la rhat shown in my aforen i coniiyirises'a hopper s con- .irfi'er fu and discharging into a be r in whicli is a screw coneh propels the plastic material i he chamber l). 'lhe rate of eedis .,rned by determining the yspeed of rotation of its propeller screw, which is driven by a chain fw 'from a sprocket on the stirrer shaft the latter being driven by a chain u vvom any suitable part of the braiding-matli the arrangement shown in Fig. 3 the lower die l2 has an opening only large enough to Yfreely admit the newly braided web, being tlius located entirely above the yarns l Hence 'there is no preliminary i1npregnation of the yarns before they unite '1 form the lweb, the entire impregnating l due to the penetration of the astio material Within the chaminifezitien may be otherwise modii'ied aout departing from its essential feac n nich are set forth in the claims.

l 'nvention is not limited to the braid in or weaving of a web uponv a rubber core il. as it may be applied in connection with tubular textile Web Whether braided or claim as my'inventionz-v The process of making liosevvliich con- Er' i while introducing a dense plastic matearound the newly-formed Web above and in contact with the converging yarns at such to `penetrate the mesh thereof.

The process ot' making hose which conin forming an ascending tubular textile "feb, liile introducing ai 'dense plastic matei. around the exterior of the newlyformed L the mesh. thereof, and into in forming an ascending tubular textile' the converging yarns, and re- :acercara moving an excess of such material lr'oni thiy web.

3. Avn apparatus for making hose, com` prising means for forming a tubular textile web, and means for introducing a plastic material around the newly-formed web com pris-ing a coating chamber and inf-ans foi l forcing the material thereinto under prcssure.

fl. An apparatus for making hose, coni prising means for forming a tubular textile web and feeding it upwardly as formed, and means for introducing a plastic mate' rial directly above the converging yarns adapted to permit the material to gravitate into the yarns.

5. An apparatus for making hose, c oinprising means .for forming a tubular textile web and feeding it upwardly as formed, and

,means for introducing a plastic material directly above the converging yarns, compris ingl a coating chamber having a bottom openingr largo enough to admit the web, and havingatop lwiper die and means for forcing the material into said chamber.

6. An apparatus for making hose, comprising means lior forming a tubular textile web and feeding it upwardly as formed, and means for introducing a plastic material directly above the converging yarns, comprising a coating chamber'having a bottom l y opening materially larger than the Webarrangedl to be entered by the converging yarns, a top Wiperdie, and means for forcing the material into said chamber.

A ln witness whereof, l have hereunto signed my name in the presence of two subscribing Witnesses. y HENRY ZENAS CBB. Witnesses:

Farini; J. l/Vns'rwoon,l EDWIN li. Srionivnr. 

